Suction cleaner



Jan. 2.8, 1947.V l F, K, CMISKEY 2,414,853

suc'rIoN CLEANER Filed Feb. 1o.Y i944 5- E. MKM# iatented Jan. 28, 1947SCTION CLEAN ER4 Frederick K. Comiskey, Detroit, Mich., assigner to,Eureka Williams Corporation, a corporation of Michi gan ApplicationFebruary 10, 1944, Serial No. 522,184

3 Claims. 1

This invention relates to suction cleaners and `has particular referencetoa new and improved construction for theremova-ble brush elements ofthe rotary agitator of the cleaner.

Principal objects of the invention are to provide:

A new and improved construction for adjustably mounting the removablebrush element of the rotary agitator for a suction cleaner;

An adjustable brush mounting for the brush element of a rotary agitatorby means of which the position of the .brush may be adjusted withoutremoving it from the holder.,

Other objects and advantages of the invention will be apparent from aconsideration ofthe following specification taken in conjunction withthe accompanying drawing, of which there is one sheet and wherein:

Fig, l. is an elevational View of a suction cleaner agitator embodyingthe invention;

Fig. 2 is an enlarged longitudinal sectional View through a part of theagitator; i

Fig. 3 is a sectional View along4 the staggered line 33 of Fig. 2;

Fig. 4 is a fragmentary View similar to a part ci Fig. 2 butillustrating the brush element in its inner position; and

Fig. 5 is a fragmentary sectional view taken along the line 5 5 of Fig.3.

The use of an agitatorv in a suction cleaner is well known to the art.Such agitators are ro tatably mounted i-n the door nozzle of a suctioncleaner andv are adapted; to beat and/or sweep. a

surface covering during operation of the cleaner so as to expedite thecleaning of the surface covering which is, brought into operativerelationship with such nozzle of the cleaner. Such cleaners are alsoprovided with suction creating means so as to induce a flow of air intothe nozzle for the purpose of conveying into a suitable dirt-collectingreceptacle associated with the cleaner, the dirt dislodged from thesurface covering by the rotation of the agitator during the operation ofthe cleaner. Such agitators normally are driven by the motor of thecleaner in the neighborhood of 3000 R. P. M., but of course may bedriven at any desired rate.

An agitator embodying the invention may comprise in general a rotarybody or member 20 provided with beating edges 22, a pulley 24, brushes26, an axle 28, and thread guards 30. The ends of the axle 28 projectbeyond the ends of the body 26 and provide a means by which the agitatormay be operatively and rotatably positioned in the nozzle of thecleaner.

The body 2i]A may be formed of a tubular piece of metal or othersuitable material which is formed to provide the beating edges 22 andthe pulley 24. A belt (not shown) driveny by the motor of the cleaner isadapted to cooperate with the pulley 24 for drivingthe agitator aboutthe axis of the axle 28.

Directly opposite each beating edge 22 the body 2l)` may be providedwith a slot 32, and a channeled member 34 is arranged inside the body 20with the channel aligned with the slot 32 inthe body. The side anges ofthe channeled member 34 may be suitably secured to the inner surface ofthe body 20 along the sides of the slot 32. The channeled member 34provides an elongated groove or recess or socket for accommodating theback 36 of the brushes 26.

Each brush 26 comprises a back 36 and a plurality of bristles which maybe arranged in tufts which are suitably securedv to the back 36. Aspring 38 arranged in the bottom of the channeled member 34 bearsagainst the rear of the brush back 36 for biasing the same outwardly.The brush back 36 at each end thereof is provided With a pair oflaterally extending lugs or projections 43. Each side wall of thechanneled member 34 at each end thereof is provided with a T-slot 4?.-which is adapted to accommodate the` lugs 43. Each T-slot 42 is formedto provide a pair of shoulders 44 and 46, each of which shoulders 44 and46 is separated from the leg 48 of the T-slot by a hump 50. The lugs 46on the brush back 36 are so spaced that they may be inserted into theT-slots l42 through the leg 48 thereof. Then by shitting the brush back36 .toward the pulley 24 the lugs 43 may be positioned against theshoulders 46. As the spring 38 biases the brush back 36 out of the slot,it will be evident that the lugs 40 will be held against such shoulder46. In this position the brush back 36 will be in its innermostposition.

The shoulders 44 and 46 are spaced different distances from the axis ofrotation of the rotary body 26, say for example the shoulders 44 arepositioned T1@ inch farther away from such axis than the shoulders 46.Initially the brush back 36 is set so that it is in its innermostposition. After the bristles of the brush 26 have become worn, the brush26 may be positioned farther away from the axis of rotation so as tocompensate for the wear of the bristles. Thus by shifting the brush back36 away from the pulley and so as to engage the lugs 40 with theshoulders 44, an adjustment of the brush 26 to compensate for wear ofthe bristles may be obtained.

In order to shift the lugs 40 out of engagement with the shoulders 46and into engagement with the shoulders 44 it is necessary `to depressthe back 36 into its slot against the spring 38 sufcient to permit thelugs 40 to clear the humps 50 and then lto shift the brush back 36 awayfrom the pulley and to the other end of the T-slot where the spring 38will hold the same in engagement with the shoulder 44.

The construction of one-half of the agitator only has been described,but the construction of the other half may be the same, except that thebrush 26 and its mounting on the opposite side of the pulley 24 arepositioned opposite to the brush 25 as just described.

While the invention has been described with some detail, it is to beunderstood that the description is for the purpose of illustration onlyand is not definitive of the limits of the inventive idea. The right isreserved to make such changes in the details of construction andarrangement of parts as will fall Within the purview of the attachedclaims.

I claim:

1. A rotary brush for a suction cleaner comprising a hollow body havinga channel shaped member forming an elongated socket therein, a brushback arranged in said socket, and having bristles projecting beyond saidbody, each of the longitudinal side walls of said channel shaped memberadjacent each end thereof being relieved .to provide groups ofshoulders, said shoulders of 'one group being arranged at a differentdistance from the axis of rotation of said body than the shoulders ofthe other group, each of said side walls being provided with at leastone shoulder of each group, each longitudinal side of said back beingprovided with a laterally extending lug adjacent each end thereof, saidlugs being selectively engageable with the shoulders of each group toposition said back relative to said body, said socket being longer thansaid back and the shoulders of one group being disposed at one side ofthe shoulders of the other group so that shifting of said back endwisein said socket will align said lugs with one or the other of said groupsof shoulders, said channel shaped member being further relieved radiallyinward from the 'surface of said body to provide radially extendingslots offset from said shoulders but affording access for seating saidlugs against said shoulders so as to permit said brush back to beinserted in and removed from said socket in a radial direction, saidlugs and shoulders forming the sole means for retaining said brush backin said socket, and a spring biasing said lugs against said shoulders.

2. A rotary brush for a suction cleaner comprising a hollow body havinga channel shaped member forming an elongated socket therein, a brushback arranged in said socket and having bristles thereon, each of theside walls of said channel shaped member adjacent each end thereof beingprovided with a slot, said slots forming shoulders below the surface ofsaid body, each longitudinal side of said back adjacent, each endthereof being provided with a laterally extending lug, said lugs beingengageable With the shoulders to position said back in said socketrelative to said body, said socket being longer than said back, saidchannel shaped member being further relieved radially inward from thesurface of said body to provide radially extending slots offset fromsaid shoulders but affording access for seating said lugs against saidshoulders so as to permit said brush back to be inserted in and removedfrom said socket in a radial direction, said lugs and shoulders formingthe sole means for retaining said brush back in said socket, and aspring biasing said lugs against said shoulders.

3. A rotary brush for a suction cleaner comprising a body having anelongated socket therein, a brush back arranged in said socket andhaving bristles therein, each of the side Walls of said socket adjacenteach end thereof being provided with a T-slot, said slots forming groupsof shoulders, said shoulders of one group being arranged at a differentdistance from the axis of rotation of said body than the shoulders ofthe other group, each of said side walls being provided with at leastone shoulder of each group, each side of said back adjacent each endthereof being provided with a laterally extending lug, said lugs beingselectively engageable with the shoulders of each group to position saidback in said socket relative to said body, said socket being longer thansaid back and the shoulders of one group being disposed at one side ofthe shoulders of the other group so that shifting of said back endwisein said socket will align said lugs with one or the other of said groupsof shoulders, and a spring biasing said lugs against said shoulders, thelegs of said T-slots extending into said body from the surface thereofand being arranged so that said lugs may be brought into alignmenttherewith by endwise shifting of said back so as to permit removal ofsaid back from said socket and separation thereof from said body in a,radial direction, said lugs and shoulders forming the sole means forretaining said brush back in said socket.

FREDERICK K, COMISKEY.

